[Qt-interest] QTree* with custom widgets

[Malyushytsky, Alex]

>> Now the case with setIndexWidget/setItemWidget is that the size of the QTreeWidgetItem (or whatever you'd like to call it) doesn't change as long as I don't collpase and reopen the tree again.

This means that all you need is to force QTreeWidget to update when you done editing (you will have to figure out when yourself, cause it depends on your widget)

I am sure it should be a way.
You could always do the following, cause it is equivalent of what you were doing with probably even completely acceptable graphics update.
- setUpdatesEnabled ( false );
 - collapse/ expand
   or removeItemWidget and insert it back (should inforce updating this widget.
- setUpdatesEnabled ( true );

But I believe there should be direct way to inforce QTreeWidget to update

I don't have access to my development machine right now, so can't test it , but hope can give you some hints.

1. check that uniformRowHeights () is false. 
2. try call update() on QTreeWidget

3. Finally check what is called in QAbstractItemView::setIndexWidget(...)
(QT source) to update geometry. It should be  
QAbstractItemView::dataChanged ( ... ).
Call it yourself. This probably is the best way and should work.


Regards,
   Alex
 
 
________________________________________
From: Bernhard Friedreich [mailto:friesoft at gmail.com] 
Sent: Monday, March 16, 2009 3:17 AM
To: Malyushytsky, Alex
Subject: Re: [Qt-interest] QTree* with custom widgets
 
Because the widgets needs the ability to be resized! (dynamic content)
>From the Qt docu:
This function should only be used to display static content in the place of a tree widget item. If you want to display custom dynamic content or implement a custom editor widget, use QTreeView and subclassQItemDelegate instead.
 
2009/3/16 Malyushytsky, Alex <alex at wai.com>
Why QTreeWidget::setItemWidget is not working for you?

void QTreeWidget::setItemWidget ( QTreeWidgetItem * item, int column, QWidget * widget )

Regards,
   Alex




________________________________________
From: qt-interest-bounces at trolltech.com [mailto:qt-interest-bounces at trolltech.com] On Behalf Of Bernhard Friedreich
Sent: Sunday, March 15, 2009 1:44 PM
To: qt-interest at trolltech.com
Subject: [Qt-interest] QTree* with custom widgets

Hey!

I've been fighting with a problem for quite some time now and I've now reached the point from which on I have now idea what is left, I could try. I really hope you guys (and girls ^^) can help me.

I want to use a QTreeView or QTreeWidget (doesn't really matter) with custom widgets.

I've got those requirements:
* Custom widgets (different rows = different widgets, 0st column: normal description text, 1st column: the widget)
* dynamic resizing (adding widgets at runtime to the custom widget)
* the widgets must be shown all the time (NOT JUST FOR EDITING!)
I've tried setIndexWidget, setItemWidget, a QGraphicsView and ItemDelegates with the paint method..

Already searched on many forums, google and mailings lists but nothing useable turned up.

Here's the thread where I asked for help (provides some more information): http://www.qtforum.org/article/27021/qtree-with-custom-qwidgets.html

I'd REALLY appreciate if you could help me... I'm totally lost atm...

Thanks for your help :-)

Best regards,
Bernhard Friedreich, Qt fan and developer :-P


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